1385441951 has 2 divisors, whose sum is σ = 1385441952. Its totient is φ = 1385441950.

The previous prime is 1385441927. The next prime is 1385441963. The reversal of 1385441951 is 1591445831.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1385441951 - 2⁶ = 1385441887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1385441899 and 1385441908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385441051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692720975 + 692720976.

It is an arithmetic number, because the mean of its divisors is an integer number (692720976).

Almost surely, 2^1385441951 is an apocalyptic number.

1385441951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385441951 is an equidigital number, since it uses as much as digits as its factorization.

1385441951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 41.

The square root of 1385441951 is about 37221.5253717523. The cubic root of 1385441951 is about 1114.7978213322.

The spelling of 1385441951 in words is "one billion, three hundred eighty-five million, four hundred forty-one thousand, nine hundred fifty-one".